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相关概念视频

Time-Domain Interpretation of PD Control01:07

Time-Domain Interpretation of PD Control

87
Proportional-Derivative (PD) control is a widely used control method in various engineering systems to enhance stability and performance. In a system with only proportional control, common issues include high maximum overshoot and oscillation, observed in both the error signal and its rate of change. This behavior can be divided into three distinct phases: initial overshoot, subsequent undershoot, and gradual stabilization.
Consider the example of control of motor torque. Initially, a positive...
87
Turbine-Governor Control01:17

Turbine-Governor Control

197
Turbine-governor control is crucial for maintaining power system stability by balancing turbine mechanical power output with electrical load demand. This mechanism ensures that generator frequency and rotor speed are within acceptable limits during load variations. Turbine-generator units store kinetic energy due to their rotating masses; this energy is released to meet the load requirement when the load increases. The electrical torque of turbines rises to meet the demand, whereas the...
197
PID Controller01:19

PID Controller

113
Proportional-Integral-Derivative (PID) controllers are widely used in various control systems to enhance stability and performance. In a thermostat, it adjusts heating or cooling based on the temperature difference between the actual and desired levels. They are often used in automotive speed systems, effectively managing sudden speed changes while maintaining a constant speed under varying conditions. On the other hand, PI controllers, commonly employed in voltage regulation, enhance stability...
113
Load-frequency control01:28

Load-frequency control

147
Load-frequency control (LFC) is vital for maintaining power system stability, ensuring that frequency and power flows remain within acceptable limits during load changes. Turbine-governor control eliminates rotor accelerations and decelerations following load changes. However, a steady-state frequency error persists when the change in the turbine-governor reference setting is zero. In an interconnected power system, each area agrees to export or import a scheduled amount of power through...
147
Control of Power Flow01:30

Control of Power Flow

262
There are several methods to control power flow in power systems:
262
The Swing Equation01:21

The Swing Equation

375
The Swing Equation is a fundamental tool in power system dynamics, especially for analyzing the behavior of generating units like three-phase synchronous generators. This equation emerges from applying Newton's second law to the rotor of a generator, encompassing factors such as inertia, angular acceleration, and the interplay between mechanical and electrical torques.
In a steady-state operation, the mechanical torque (Τm) supplied to the generator is balanced by the electrical torque...
375

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超扭曲MPPT控制用于使用更高顺序滑动模式观察员的电网连接的光伏/电池系统.

Vijaya Kumar Dunna1, Kumar Pakki Bharani Chandra2, Pravat Kumar Rout3

  • 1Department of Electrical Engineering, ITER, Siksha 'O' Anusandhan (Deemed to be University), Bhubaneswar, 751030, India.

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概括

本研究介绍了光伏系统的新控制策略,以最大限度地提高功率输出. 综合高阶滑动模式观察者-超扭转控制提高了联网场景的效率和稳定性.

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科学领域:

  • 电气工程 电气工程
  • 可再生能源系统可再生能源系统
  • 控制理论 控制理论

背景情况:

  • 由于能源需求的增加,光伏发电 (PV) 正在增加.
  • 传统方法在与电网连接的光伏系统中难以跟踪最大功率点 (MPPT),面临低效率和稳定性等问题.
  • 需要先进的控制策略来优化光伏阵列的电力采集.

研究的目的:

  • 提出一个强大的控制策略,以加强与电网相连的光伏系统的最大功率点跟踪 (MPPT).
  • 在动态和故障条件下解决传统MPPT技术的局限性.
  • 提高光伏发电的整体效率和稳定性.

主要方法:

  • 建议采用一个高阶滑动模式观察 (HOSMO) 和超扭转控制 (STC) 战略的组合.
  • 使用扰动和观察 (P&O) 技术来产生参考电压.
  • 使用HOSMO来估计用于驱动光伏增压转换器中的STC的电感器电流.

主要成果:

  • 拟议的HOSMO-STC控制器在响应时间方面表现出优异的性能,与现有的控制器相比.
  • 控制器的有效性在各种场景中得到验证:生成变化,动态故障,岛屿,重同步和负载变化.
  • 使用OPAL-RT (OP4510) 的模拟和实时验证证了控制器的有效性.

结论:

  • 组合的HOSMO-STC为联网光伏系统中的MPPT提供了有效的解决方案.
  • 拟议的控制器在不同操作条件下提高了系统稳定性和电力采集效率.
  • 这种先进的控制策略有助于更可靠,更有效地将光伏电力集成到电网中.